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1-NAPHTHOLPHTHALEIN Indicator grade
| Article No. | Grade | Purity | CAS No. | Molecular Formula | Molecular Weight | H.S. Code | Shelf Life |
|---|---|---|---|---|---|---|---|
| SC3640 | Indicator grade | 596-01-0 | C28H18O4 | 418.45 | 3204.9000 | 60 Months |
Packings
| 1 g,5 g |
Physical Properties
| Physical state at 20 °C | Solid |
| Colour | Black powder |
| Odour | Characteristic odour |
| Melting point/ Freezing point [°C] | 238 - 240 °C |
| Vapour density | 14.44 |
| Solubility in water [% weight] | Insoluble in water |
| Partition coefficient Log Pow octanol / water at 20°C | 5.41 |
Specifications
| Appearance | Light Pink to Beige to Red-Brown Powder |
| Infrared spectrum | Conforms |
| Absorption maxima (0.1N NaOH) | 648 to 654 nm |
| Specific absorptivity 1%/1cm (at λmax) | Min 550.0 |
| Visual transition interval | from pH 7.3 (pink-yellow) to pH 8.7 (green-blue) |
| Loss on drying (at 110°C; 1 hr) | Max 5.0% |
Safety Information and Hazard Symbols
|
|
|---|---|
| Symbol | GHS07 |
| Signal Word | Warning |
| UN No. | |
| IMCO Class No. | |
| Packing Group | |
| Hazardous Statement | H315-H319-H335 |
| Precaution Statement | P261-P305 + P351 + P338 |
| Risk Statement | |
| Safety Statement | |